An implicit unsteady hydraulic solver for suspended cuttings transport in managed pressure wells
We present a simulation tool for transient events in complex hydraulic networks. The code includes modelling of the transport of suspended cuttings in near-vertical wells. An unstructured finite volume formulation with implicit time integration has been chosen. The unconditional stability of the integrator makes the method suitable for the simulation of transient events over a wide range of characteristic timescales. It handles both very fast transients (e.g. fluid hammer events) and the long-term evolution of the well (e.g. hole cleaning operations). The software has been developed to address the need of the oil industry for a robust and efficient predictive tool allowing effective well control in managed pressure drilling operations. The physical modelling follows the standard practices accepted by the industry (e.g. mud rheology computations). The mathematical foundation of the algorithm is described followed by validation cases that illustrate its capabilities and accuracy. Finally, a practical industrial application example is provided to demonstrate the real-world performance of the software.
KeywordsUnsteady Hydraulics Oil well Cuttings transport
This research was partially funded by Weatherford International.
Compliance with ethical standards
Conflict of interest
On behalf of all authors, the corresponding author states that there is no conflict of interest.
- 1.Malloy KP et al. (2009) Managed-pressure drilling: what it is and what it is not. In: IADC/SPE Managed pressure drilling and underbalanced operations conference and exhibition, San Antonio TXGoogle Scholar
- 2.Elliot D et al (2011) Managed pressure drilling erases the lines. Schlumberger Oilfield Rev 23(1):14–23Google Scholar
- 3.van Riet EJ, Reitsma D (2003) Development and testing of a fully automated system to accurately control downhole pressure during drilling operations. In: SPE/IADC Middle East drilling technology conference and exhibition, Abu DhabiGoogle Scholar
- 4.Guo C et al (2010) Managed pressure drilling micro flux technology allows safer drilling in highly sour reservoirs. In: International oil and gas conference and exhibition in China, BeijingGoogle Scholar
- 5.Streeter VL, Wylie EB (1998) Fluid mechanics, international 9th revised edn. McGraw-Hill Higher Education, New YorkGoogle Scholar
- 7.Amein M, Chu HL (1975) Implicit numerical modeling of unsteady flows. J Hydraul Div ASCE 101(6):717–731Google Scholar
- 8.Wylie EB, Streeter VL (1970) Network system transient calculations by implicit method. In: 45th Annual meeting of the society of petroleum engineers of AIME, Houston TXGoogle Scholar
- 11.Anderson JD (1995) Computational fluid dynamics: the basics with applications. McGraw-Hill, New YorkGoogle Scholar
- 12.(2010) Rheology and hydraulics of oil-well fluids—API recommended practice 13D, 6th edn. American Petroleum Institute, Washington DCGoogle Scholar
- 16.Bourgoyne AT, Millheim KK, Chenevert ME, Young FS (1986) applied drilling engineering. SPE Textbook Series, Richardson, pp 173–183Google Scholar
- 18.Godunov SK (1954) Different methods for shock waves. Ph.D. thesis, Moscow State UniversityGoogle Scholar
- 19.Stein E, de Borst R, Hughes TJR (eds) (2004) Encyclopedia of computational mechanics, vol 1, Chapter 14, Wiley, HobokenGoogle Scholar